Nwafor Bosch

Defensive tackle Ikenna Nwafor (right) will likely take a medical retirement, head coach David Shaw said on Monday. (STEPHEN BRASHEAR/isiphotos.com)

SEATTLE, WA – September 28, 2013: Stanford defensive tackle Ikenna Nwafor is blocked by Washington State offensive linesman Elliott Bosch during play at CenturyLink Field. Stanford won 55-17